Improvement in swivel-shackles



UNITED STATES PATENT OFFICEO THOMAS B. ROCHE, OF FOLSOM CITY, CALIFORNIA.

IIVIPROVEIVI'ENT IN SWIVEL-SHACKLES. o

Specicatioh forming,- part of Letters Patent No. 55,162, dated May 29, 1866.

To all whom 'it may concern:

Be it known that I, THOMAS B. ROCHE, ot Folsom City, county of Sacramento, State of California, have invented a new and Improved SwivelShackle5 and I do hereby declare that the following is a full, clear, and exact description thereof', which will enable others skilled inA the art to make and use the same.

The present invention relates toa swivelshackle especially adapted for the hoisting` of heavy weights, such as heavy blocks of granite and other stones in quarries, it (the said shackle) possessing many superior advantages over the ordinary swivel-blocks, such as, for instance, it is much cheaper, works much better, economizes expense, and saves much annoyance, and prevents all twisting ofthe rope, as will be obvious from the following detail description thereof, reference being had to the accompanying plate of drawings, in which- Figure l is a side view of the swivelshackle 5 Fig. 2, an edge view of the same.

A in the drawings represents the shackle, made of round iron ot' one-half an inch (more or less) in diameter, bent around into a circular shape, or partially so, with a bolt, B, having a head, C, upon one end and a pin, D, in the other, passed through the openings in each end of the same. Through the` center of the bolt B a pin, E, is passed and fastened by a screw-nut, F, upon its inner end, which pin is bent into the form of an eye, G, on which is a thimble, H, to prevent the cutting of the rope.

The circular portion Aof the shackle forms a becket in the strap of the block, and to the eye of the swivel the standingpart of the rope is made fast, so that any twist of the rope is always free to become untwisted.

With a swivel-shackle as above described a new rope can be put in two or more double blocks, and by putting this in one of them all the twist ofthe rope will be taken out without removing the rope, the importance of which, especially in damp weather or when a rope is rstused, is obvious; and it furthermore obviates all the annoyance heretofore experienced to prevent the blocks from twisting, especially when at any considerable distance apart.

What I claim as new, and desire to secure by, Letters Patent, is-

The swivelshackle constructed substantially as herein described.

The above specification of my invention signed by lne this 11th day of January, 1866.

THOMAS B. ROCHE. 

